18139292945856 has 42 divisors (see below), whose sum is σ = 51993008080832. Its totient is φ = 6046430981760.

The previous prime is 18139292945849. The next prime is 18139292945911. The reversal of 18139292945856 is 65854929293181.

18139292945856 is a `hidden beast` number, since 1 + 8 + 1 + 39 + 2 + 9 + 2 + 9 + 4 + 585 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15745913440 + ... + 15745914591.

Almost surely, 2^{18139292945856} is an apocalyptic number.

18139292945856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18139292945856 is an abundant number, since it is smaller than the sum of its proper divisors (33853715134976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18139292945856 is a wasteful number, since it uses less digits than its factorization.

18139292945856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31491828049 (or 31491828036 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 72.

The spelling of 18139292945856 in words is "eighteen trillion, one hundred thirty-nine billion, two hundred ninety-two million, nine hundred forty-five thousand, eight hundred fifty-six".